"Oira Sukeban" is a manga series that centers on the life of a young girl named Oira, who becomes the leader of an all-female delinquent gang. The story is set in a high school environment where Oira, initially a quiet and unassuming student, is thrust into a position of power after a series of confrontations with rival gangs. Her rise to leadership is marked by her unexpected strength, strategic thinking, and a strong sense of justice, which earns her the respect and loyalty of her peers.

The narrative explores the dynamics of Oira's gang as they navigate the challenges of maintaining their territory and reputation. The gang faces numerous adversaries, including male-dominated delinquent groups and other female gangs, each with their own motivations and methods. Oira's leadership is tested as she balances the need for assertiveness with her desire to protect her friends and uphold a code of honor. The series delves into themes of loyalty, friendship, and the struggle for identity within a subculture that often values strength and dominance.

Key characters include Oira's closest allies, who each bring unique skills and personalities to the group. These characters are developed through their interactions and backstories, which reveal their reasons for joining the gang and their personal struggles. The relationships between the characters are a focal point, highlighting the bonds formed through shared experiences and mutual support.

The plot is driven by a series of conflicts and resolutions, with each arc focusing on a new challenge or adversary. The series maintains a balance between action-packed confrontations and quieter, more introspective moments that provide insight into the characters' motivations and growth. The setting of the high school and surrounding neighborhood serves as a backdrop for the gang's activities, with the environment reflecting the tensions and hierarchies within the delinquent subculture.

Overall, "Oira Sukeban" presents a compelling exploration of leadership, camaraderie, and the complexities of navigating a world where strength and loyalty are paramount. The series offers a detailed portrayal of its characters and their journeys, set against the backdrop of a competitive and often volatile high school environment.